Wednesday, 28 May 2014

Great cormorant

Common name:great cormorant (en); corvo-marinho-de-faces-brancas (pt); grand cormoran (fr); cormorán grande (es); kormoran (de)Taxonomy:Order PelecaniformesFamily PhalacrocoracidaeRange:This widespread species is found throughout most of Europe, central and southern Asia, north-western and eastern Africa, along the coast of eastern North America, and throughout Australia.Size:These large cormorants are 70-100 cm long and have a wingspan of 120-160 cm. They weigh 2,6-3,7 kg.Habitat:The great cormorant is found in coastal waters, estuaries, rocky shores, mangroves, large lakes and rivers, and deep marshes, including inland wetlands located far from the coast.Diet:They mostly hunt fish, such as sculpins, capelins, gadids, mullets and flatfishes, but also crustaceans, amphibians, molluscs and bird nestlings.Breeding:Great cormorants are monogamous and pair bonds may last several years. They nest in colonies of up to 9.000 pairs, each pair nesting in a rocky ledge in a small rocky island or coastal cliff, which they line with twigs. The female lays 3-5 bluish-green eggs, which are incubated by both parents for 28-31 days. The chicks are fed by both parents and fledge 45-55 days after hatching, but continue to receive food from the parents for another 2-3 months. They reach sexual maturity at 2-4 years of age.Conservation:IUCN status - LC (Least Concern)This species has an extremely large breeding range and a global population estimated at 1,4-2,9 million individuals. The overall population trend is increasing, although some populations may be stable and others have unknown trends.